Corey Oswalt vs. Roy Witherup — Career Comparison

On the career pitching numbers, Roy Witherup posted a stronger line than Corey Oswalt. Roy Witherup posted stronger numbers in ERA (4.44 vs 5.89) and home runs allowed (0.17 per nine innings vs 1.81). By the career numbers, Roy Witherup had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.